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168
COMPONENTS TESTING
Test System Flow (Outdoor 24k and 36k)
Cooling mode
The pressure on the
high side.
Test system
pressure.Does the low
pressure normal at
service part ?
The pressure on the
low side.
Air remaining at the
yes
refrigerant system.
Recharge refrigerant
after air purging with
the vacuum
pump.Does the low
pressure nomal over
again?
NO
Recharge
yes
refrigerant .
The system wants
refrigerant.The service
people must be ration
refrigeran.Is the low
pressure rise ?
The refrigerant system
blocked.Please check
the Capillary Tube （or
electronic expansion
valve)Is it blocked?
Check check valve and 4‑
way valve.
If the pressure is
close to static
NO
pressure?
NO
Unsolder the capillary tube
ASS'Y(or electronic expansion
valve).The capillary tube1 is blown
by N
2
.
yes
NO
yes
Heating mode
4‑way valve collude or
compressor exhaust very
ebb.
The pressure on the
high side.
Test system
pressure.Does the
high pressure normal
at service part ?
The pressure on the
low side.
Air remaining at the
yes
refrigerant system.
Recharge refrigerant
after air purging with
the vacuum
pump.Does the high
pressure normal over
again?
NO
yes
Recharge refrigerant
The system wants
refrigerant.The service
people must be ration
refrigeran
.Is the high
pressure rise in heating
mode?
If the pressure is close
to static pressure?
yes
4‑way valve collude or
compressor exhaust every
ebb.
NO
Check heat exchanger and
4‑way valve.
NO
Remove the back
panel."see"the
capillary tube1 and
defrosting?
yes
capillary tube2.Is it
NO
The capillary tube
blocked.Unsolder the
capillary tube ASS'Y.The
capillary tube1 and capillary
tube2 is blown by N
2
.
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